Visual photometry and solid angle, Physics

Assignment Help:

VISUAL PHOTOMETRY: The branch of science which deals with measurement of brightness or luminous intensities of light emitted by different sources using certain standards and techniques is called visual photometry.

SOLID ANGLE : The ratio of the area of the surface of the portion of a sphere enclosed by the conical surface forming the angle to the square of the radius of the sphere is called solid angle.

LUMEN: Lumen is the amount of light energy emitted per second by a uniform (point) source of one candela with in a cone of unit solid angle.

CANDELA: Candela is defined as the luminous flux emitted per unit solid angle along normal to the surface by one sixtieth (1/60) square cm area of a black body radiator (source) kept at the temperature of solidifying platinum (at 2046 K).


Related Discussions:- Visual photometry and solid angle

Illustrate v - i graph for ohmic and non-ohmic materials, Illustrate V - I ...

Illustrate V - I graph for ohmic and non-ohmic materials. Give one example for each.

Calculate the maximum kinetic energy of photoelectrons?, Light described at...

Light described at a place by the equation E=100[sin(5*10^15)t + sin(8*10^15)t] falls on the metal surface having work function 2eV.calculate the maximum kinetic energy of photoel

Hr diagram, How to draw hr diagram including life cycle of the sun

How to draw hr diagram including life cycle of the sun

Specific latent heat, explain specific latent heat of fusion with formula

explain specific latent heat of fusion with formula

Falling objects, Hello, I''d like to ask, why do objects, that fall from hi...

Hello, I''d like to ask, why do objects, that fall from higher heights hit stronger that those, falling from smaller heights, if force equals mass times acceleration, and yet accel

Determine electric field vector for a negative point charge, For a negative...

For a negative point charge, the electric field vectors: a) Circle the charge b) Point radially in toward the charge c) Point radially away from the charge d) C

Michelson interferometer., why michelson interferometer is called interferr...

why michelson interferometer is called interferrometer

Explain degree of freedom, The number of independent directions in which a ...

The number of independent directions in which a system (or gas molecule) can have motion, are called as the number of degrees of freedom of that molecule or object. The number of d

Principle rays to contribute to the image, A person is tasked with creating...

A person is tasked with creating a ray diagram to resolve the characteristics of the image of an object formed by a concave lens. The person has accurately drawn the principal axis

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd